>For example, the Second Amendment wasn't incorporated against the states until 2010 in McDonald v. City of Chicago.

No. The second amendment was always incorporated "against" (for) the states.

McDonald only clarified what was always the reality. That a state can not preempt federal laws with keeping and barring arms for self defense. Notice that last part, the SPECIFIC INTENTION of the case is for self defense.

Your own link makes note that selective incorporation doesn't apply to the bill of rights. Well, it does but not objectively. It's pretty ridiculous to make the assertion 2010's McDonald and not 2008's Hellar the "the 2A law". But that was your goal to find something that fit an antigun narrative.